Conduit or culvert mold.



N. E. WHETSTONE.

CONDUIT 0R CULVERT MOLD.

APPLICATION FILED DEC. 5. |917.' 1,275.1 15. a Patented Aug. 6,1918.

2 SHEETS-SHEET l.l

@www a cmi-nn salaries PATENT:10F-FICE l f N :EWELL n. wHETsroNE, or roIiAi-D, oHIo;

To all whom t may concern: Be it .known .that I, NEWELL E.y VVHE'r- STONE, ac'itizenof the ."United States, residing at Poland,- in the county vof Mahoning; Statefiof Qhi'O, haveinvented a new# and useful Conduit-orfCulvert Mold; 'and1 I do hereby declare the followingVto-'he'a full, 'clear,;andleXact description of the invention, such as willenableotliers skilledin th'e'f'art tofwhich itappert'ainsto niake' anduse-.the Sajmm4 1' l .412 'if'. .2A 25.2";"5: Thisy invention4 relates to an improved inold .for :molding ceinent conduits,y ori culverts,Y andone ofthe vobjects* oflthe invention is'ftoI provide. a siinple,eiii'cie11t1 and .practical mold consisting of inner and outer'tubular shells', between .which .the cement"V is deposited,tol form Ithe wall of `the conduit.: v A further object. of the ,'inventin is. the provisionl zof tie ori-connecting wires, @to fhold the'shells concentrici f Af' furthery obj ect; of the invention: is. .the provision oaf doublei flanged head atgeaoh end .of the mojld yto 1 insure holding the .shells concentr ically1 arranged..?` ff' .7. A furthery 0b 'ect 'cof fthe :invention .-is the provision offfmeans .havingilink connections with theejnds ofiflieinner shellat thefopposite v ends of the mold, `for,expandingj ,and

contracting lthe inner 'shellwhich is longif` tudinallyspliilV '.ggAj 'furtherV Y bj ect ofthe-invention, .is Athe provision of ;Ineansf forzmolding- Y culverts seinifcircularI incross section.v 1 I `.fg-In practicalelds thedetails. of construction may necessitate alterations lta'llinglwithinthe scope of what is claimed. 5 f flhe invention comprises Y further` features and combination of .parts as hereinafter ,set forth shown'in the. drawings 'andclairnedvl lInthe drawings :I

. f., `ligureY 1 is aviewin side elevationotthe improvedl mold constructed in .accordance ,Y j ith the invention. showing .interior parts in dotted lines.` f Y 1 f gf.

Figa?, is a. longitudinalsectional view. .Fgf is a view-9i one @hd `ofthe .nwld-l Fig. 4 is .a sectional view on line vof Figil. n @F.'g 5

iS la, :view leijtlue ,opposite end lof UFig. Gisr a detail-.perspective means at, one end Qf the 1110.1014 f9.1?, @readme the 5.11.1161?.tubular!Sheller.v a' ,Yiew'ieslasleistlon Ot-.a

' j 'coinju'mf1A on convenir-Mom). y'

l j `Speciicateii Aof LettersPatentfE Patented Ag f6; i918;

Application mea December 54.1917. serial No. 205,577.11

mold `for molding a culvert semi-circular in cross.section. i .j i, i Die. '-iFig. 8^is a longitudinal"sectionalview throughxFigrJ p' 1, fr .l Fig. 9 is a viewfof one endfiofthe'niold SllOWlI i .if 'i f 1.' "n .lsFig. V10 is 'a viewof :the opposite end'of th'emold. j' Ig i :i A D Fig. 11 is a sectional view-onfn line fllof 14`ig.7..,;- 1-

Fig. 12 "is an enlarged i. detail? sectional view 'of the jointbetwen theltwoV parts of `the innerlnelnber ofthe culvert Inol'dzshowring inFigs. Tand 8.... Pf. EI Y Fig. 13 is a detail perspective viewzof one of the spacingblocks used d spacing the inner and outerV shells ofthe culi vert mold. l 1 f Referring more especially tothe drawings 1 and-2 designate-the inner and outer shells of the mold, which are split longitudinally5 as ,shown at 3' and 4i .Thesesplitseach of which is constructed, ony a. .'biasgfare! gde# signed7 ,whereby the joined walls may-over-y lapv slightly l slidably. ,Thefinner and outer shells at` lcorresponding diainetricall-y "oppe-I forassisting :in

site-points have apertures-5 andf-Wi-res are passed through the aperturessand-G', and the opposite ends. of each-Wire 7 areabrought to:

ward eachy other and twisted together onthe outer surface of the buterfshell,"assisting in holding-the two shells concentric. Suitable spacing.` blocks 8 are: interposed between' tHe walls ofthe shells,` in order toV additionally insurespacing of theinner and outer-s'hells; Both ends of Vthe inoldare provided with ring shaped cover plates 9 provided with flanges 10 and 11. rlhe flanges 10 telescope the outer shell andthe `flangesll telescopeinto the inner shell, thereby holding theftubular-.shells of the mold in positive concentricity.-

l il) .The inner and outer?shellsandtheflanges 10 andll vhave apertures 12, which receive the Wires 1.3, theendsfof eaeh'ff-{which are twisted together onfthe,exteriorzoff.the angfe 10, in order to hold vthe attendantpparts in place. Atthe end of the mold oppositev the Y plate 9,V the inner shell isprovidediwith' spaced lugsor ears 14 arranged in pairs. Pivoted between ythe lugs of veach pairis a link 15.k The links extend radially "and theirinner adjacent ends are .provided -faty 16' betweenrthe ears or lugs '17 (which are also arranged in pairs) of the plate"18. It is to-,beL lnoted that Aw'henthe. ,plate .18is "disf cover plate 9 is arranged whereby the flanges 310 and -11 willY telescope the inner and outer shells, holding the inner and outer shells concentric and then the plate 18 is operated until the links will expand the innershellto'its proper Aposition andfconcentric with the outer shell at the'end of the mold opposite the `cover plate V9. After so arranging the shells, cement orother' plastic material is passed through the filling opening 19 of vthe outer shell, so that it will run or flow on a level or thereabout toward opposite ends of the mold and until itk fills the space betwieen the shells. After the ce m'ent'has become set or hardened, the wires 8 and 13 may be removed, and then the cover plate 9 disconnected. The outershell will then automatically expand, since the same is stripped or severed Vas shown at 4,

. and then by pulling outwardly on the plate 18 the inner shell will be allowedto contract automatically, after which the inner and outer shellsV may be easily removed. The` expanding of the outer shell is due to the/'fact thatthe shell is constructed of sheet metal and is under an'lelastic strain, during themolding process of the culvert. Theinner shell is likewise under an elastic strain when inplace during the molding process of the culvert, but this elastic strain is just the opposite to the strain of the outer shell, and will tend to contract the inner shell, and when the plate 18'is pulled outf wardly, the contracting of the inner shell is considerably assisted. The blocks 8 will be molded in'the wall of the conduit, when the inner'and outer shells are removed.

In Figs. 'and, 8 the inner and outer shells Yare semi-circular in cross section, and are split longitudinally as shown at 20. In this manner the two shells may be constructed in two or as manyA sections 21 and 22, as

may be' desired. Thesection 21 overlaps the .section 22. The overlapped portions of said sections have apertures 23and the outer shell 24V has Yapertures 25, through which and through the apertures 23, wires 26r are arranged. Theouter` ends of the wires aretwisted togetherpas shown at 27 on the exterior of the outer shell. Suitable spacing blocks 28 are employed to hold the inner and outer shells spaced. A semi-circular ring over plate 29 is arranged at cors responding vends of the inner and outer shells, and has inner and outer Hanges 30 and 31 which telescope the shells. These flanges 30 and 31 have apertures 32 and 33, Vand one of the spacing or securing wires 26 passes through such apertures 32 and 33, to hold the cover plate 28 in place. The outer shell 24 has a filling opening 34. A cement base 35 is first constructed, and then the inner shell 36 is placed upon the base, the outer shell is then arranged concentric with the inner shell and the spacing blocks or members- 28 are arranged lto hold said shells concentric. The cover .plate 29 is then fixedand cement is subsequently passed through the opening31 illing the space between' theinner and youter shells as in the lirst instance. Y i Y The invention having been set forth what is claimed as new and useful is z; Y 1. In a conduit mold, inner and outer tubular shells of different diameters, one ar'- ranged within the other, tie wires land spacing members tohold the shells spaced, and means at each end ofthe mold to hold the opposite ends of the shells concentrically spaced. Y

2. In a conduit mold, inner and outer tubular shells of different diameters, one arranged'within'thevother, tie wires and spacing members to holdthe shells spaced, one end of themoldF having a'cover plate provided with inner Fand outer annular lianges telescoping the inner and Vouter shells, and means at one'end of the inner shell for expanding the ,same concentric With vthe outerpshell, s aid inner and outer shells being longitudinally split.l

3. Ina conduit mold, inner and outer tu-` bular shells,- each being longitudinally split, means at one end of the conduit V.to hold the shells concentric, tying meansarranged at intervals alongthe mold to holdthe shells concentric, one endof theV inner shell oppo` site said firstnamed vmeans having expansion meansto expand the inner shell concentricwith the'onter shell. v

4. In a conduit mold, innerand outer tubular shells, each being longitudinally split, means at one end of theconduit to hold the shells concentric, tyingV mea-ns arrangedat intervals ,along the mold to holdthe shells concentric, Vone end oftheinnershell opposite said yfirst named means having expan-A sion means toV expandthe inner shell concentric with tlie outer shell, said last named means comprisinga plate, said plate having link connections with the. inner shell,said links having pivotal connection with theY inner face of said plate, whereby the edges of the link will contact with the inner yface AVof' and outer shells, spacingfblocks between the shells at one end of the mold, tie Wires coniso - necting the inner and outershells intermedi- 6. In a cement mold, as set forth, inner and outer shells semi-circular in cross 'section, one being of less diameter than and arranged within the other, spacing blocks between the shells at one rend of the mold, tie wires connecting the inner and outer shells intermediate their ends and being out of alinement withrthe blocks,` the inner shell beinglongitudinally split, the outer shell, 15

having a illing opening, and a cover plate semi-circular andv having lnner and outer flanges telescoping `the inner and outer shells.

name to this specification in' the presence 'of two lsubscribing witnesses. v 4 n Y N EWELL E. WHETSTONE. Witnesses: i

H. MEER,

C. C. RUDEBAUGH.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Wuhingtomnc. f l y In'testimony whereof I have signed myY 2d Y 

